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NAD+ in the Lab: What It Is, Stability and Handling of Lyophilized NAD+

By The Bionova Club Team

Research use only. Bionova products are sold strictly for in-vitro and laboratory research by qualified professionals. They are not drugs, food, or cosmetics, are not approved by the FDA, and are not for human or veterinary use. Nothing in this article is medical advice or a claim about effects in people.

Disclosure: Bionova Club sells NAD+ in 500 mg and 1000 mg vials, linked below.

NAD+ is sold alongside research peptides, and "NAD+ peptide" is a common search. But NAD+ is not a peptide. It contains no amino acids at all. It is a coenzyme, a small organic molecule built from two nucleotides that dehydrogenase enzymes use as an electron acceptor.

This guide explains what NAD+ is chemically, where it came from, what it does in biochemical terms, why stability matters, and how to keep sealed lyophilized NAD+ in good condition.

What is NAD+?

NAD+ is the oxidized form of nicotinamide adenine dinucleotide. As the name says, it is a dinucleotide: one nucleotide containing nicotinamide and one containing adenine, joined through their phosphate groups (PubChem CID 5892).

  • Full name: Nicotinamide adenine dinucleotide (oxidized form)
  • Molecule type: Coenzyme (dinucleotide), not a peptide
  • Building blocks: Nicotinamide nucleotide + adenine nucleotide, linked by a pyrophosphate bridge
  • Molecular formula: C₂₁H₂₇N₇O₁₄P₂
  • Molecular weight: ~663.4 g/mol
  • Reduced form: NADH
  • Also listed as: Nadide
  • Bionova formats: NAD+ 500 mg and NAD+ 1000 mg (from the labels), supplied as a white lyophilized powder

Formula, weight and synonym are from PubChem (CID 5892). The formula matches Bionova's product pages.

Why NAD+ is not a peptide

A peptide is a chain of amino acids joined by peptide bonds. NAD+ has no amino acids and no peptide bonds. Its backbone is two ribose sugars, two phosphates and two nitrogen-containing bases. It sits next to peptides in research catalogs because it is supplied in the same lyophilized format, not because it is chemically related. For a primer on what does count as a peptide, see What are peptides? A primer for researchers.

A short history

The story of NAD+ is usually traced to Arthur Harden and William Young's 1906 studies of fermentation in yeast juice. They showed that fermentation depended on a small, separable factor as well as on the enzyme fraction (Harden & Young, 1906, Proceedings of the Royal Society B). That factor is now known as NAD+; Hans von Euler-Chelpin later identified it as a nucleoside sugar phosphate (Cantó et al., 2015).

What does NAD+ do? (biochemistry only)

In biochemical terms, NAD+ has two well-established roles.

1. Electron carrier in redox reactions

NAD+ accepts electrons (as a hydride) from substrates in reactions catalyzed by dehydrogenase enzymes, becoming NADH. NADH can pass those electrons on and return to NAD+. This NAD+/NADH pair is one of the central redox couples in cell chemistry (Cantó et al., 2015, Cell Metabolism).

2. Substrate that gets consumed

NAD+ is also used up as a substrate by some enzymes. The best-known example is the sirtuin family. In 2000, Landry and colleagues showed that yeast SIR2 and its homologs are protein deacetylases that absolutely require NAD+ (Landry et al., 2000, PNAS). In that reaction NAD+ is cleaved, releasing nicotinamide, rather than cycling back and forth as it does in redox chemistry.

A 2015 review covers both roles and the links between NAD+ in mitochondria and the nucleus (Cantó et al., 2015).

NAD+ vs GHK-Cu

These two come up together because both are sold as research compounds. They are unrelated:

  • Molecule type
    • NAD+: Coenzyme (dinucleotide)
    • GHK-Cu: Copper complex of a tripeptide
  • Contains amino acids?
    • NAD+: No
    • GHK-Cu: Yes: glycine, histidine, lysine
  • Contains a metal?
    • NAD+: No
    • GHK-Cu: Yes: copper(II)
  • Molecular weight
    • NAD+: ~663.4 g/mol
    • GHK-Cu: ~340.4 g/mol (GHK, without copper)
  • Color of the powder
    • NAD+: White
    • GHK-Cu: Blue

GHK weight is from PubChem CID 73587. Our GHK-Cu research overview covers the copper peptide.

NAD+ vs MOTS-c

NAD+ is also often searched alongside MOTS-c because both relate to mitochondrial biology. MOTS-c is a 16-amino-acid peptide encoded in mitochondrial DNA. NAD+ is a coenzyme. See our MOTS-c research overview.

Why stability matters for NAD+

NAD+ and NADH are chemically fragile in ways that matter to anyone working with them:

  • Oxidized and reduced forms behave differently. A classic 1961 study, "The stability of pyridine nucleotides," characterized how the oxidized and reduced forms of these coenzymes break down under different conditions (Lowry et al., 1961, Journal of Biological Chemistry).
  • In solution, conditions matter. A 2024 study of NAD+ and NADH in common aqueous buffers, done for cell-free biocatalysis, tracked them for up to 43 days and found that the choice of buffer was consequential and that even a mild temperature increase significantly affected long-term stability (Wolfe et al., 2024, Molecules).

This guide covers only the sealed, dry material. It does not cover preparing solutions.

Storage notes for lyophilized NAD+

  • Keep it sealed, cold and dry. Store the lyophilized powder in its original sealed vial, away from light and moisture.
  • Warm before opening. Let a sealed vial reach room temperature before opening so moisture does not condense on the powder.
  • Check the appearance. Bionova NAD+ is supplied as a white powder. Material that looks wet, clumped or discolored should be reported to the supplier.
  • Follow the label. Store as directed on the product label.

NAD+ 500 mg vs 1000 mg

The two Bionova products contain the same compound. The only difference is the fill amount: one vial is labeled 500 mg and the other 1000 mg. The choice is about how much material a lab needs to hold in inventory, not about a different product.

Key takeaways

  • NAD+ is a coenzyme (a dinucleotide), not a peptide. It contains no amino acids.
  • Formula C₂₁H₂₇N₇O₁₄P₂, molecular weight ~663.4 g/mol; its reduced form is NADH.
  • Biochemically, NAD+ is a redox electron carrier and a consumed substrate for enzymes such as the sirtuins.
  • NAD+ and NADH are chemically sensitive, and their stability in solution depends on conditions, so keep the dry material sealed, cold and away from light and moisture.
  • Bionova sells NAD+ in 500 mg and 1000 mg vials. It is a research material only and is not approved for human use.

Frequently asked questions

Is NAD+ a peptide?

No. NAD+ is a coenzyme made of two nucleotides. It has no amino acids or peptide bonds. It is sold alongside peptides because it comes in the same lyophilized format.

What does NAD+ do?

In biochemistry, NAD+ carries electrons in redox reactions, cycling between NAD+ and NADH. It is also consumed as a substrate by some enzymes, including the sirtuin deacetylases.

What is the difference between NAD+ and NADH?

NAD+ is the oxidized form and NADH is the reduced form. They interconvert when NAD+ accepts electrons in dehydrogenase reactions.

What is the difference between NAD+ and GHK-Cu?

NAD+ is a coenzyme with no amino acids. GHK-Cu is a copper complex of a three-amino-acid peptide. They are chemically unrelated.

What is the difference between NAD+ 500 mg and 1000 mg?

Only the fill amount. Both vials contain NAD+; one is labeled 500 mg and the other 1000 mg.

How should lyophilized NAD+ be stored?

Keep the sealed vial cold, dry and away from light, let it reach room temperature before opening, and store it as directed on the product label.

Shop for your research: NAD+ 500 mg or NAD+ 1000 mg, for laboratory research. Use code CLUB10 at checkout for 10% off.

References

  1. Harden A, Young WJ. The alcoholic ferment of yeast-juice. Proc R Soc Lond B. 1906. https://doi.org/10.1098/rspb.1906.0029
  2. Cantó C, Menzies KJ, Auwerx J. NAD(+) Metabolism and the Control of Energy Homeostasis: A Balancing Act between Mitochondria and the Nucleus. Cell Metab. 2015. https://pubmed.ncbi.nlm.nih.gov/26118927/
  3. Landry J, et al. The silencing protein SIR2 and its homologs are NAD-dependent protein deacetylases. Proc Natl Acad Sci U S A. 2000. https://pubmed.ncbi.nlm.nih.gov/10811920/
  4. Lowry OH, Passonneau JV, Rock MK. The stability of pyridine nucleotides. J Biol Chem. 1961. https://pubmed.ncbi.nlm.nih.gov/14466980/
  5. Wolfe KD, et al. Long-Term Stability of Nicotinamide Cofactors in Common Aqueous Buffers: Implications for Cell-Free Biocatalysis. Molecules. 2024. https://pubmed.ncbi.nlm.nih.gov/39598842/
  6. PubChem. Nadide (NAD+), CID 5892. https://pubchem.ncbi.nlm.nih.gov/compound/5892
  7. PubChem. Glycyl-L-histidyl-L-lysine (GHK), CID 73587. https://pubchem.ncbi.nlm.nih.gov/compound/73587

For laboratory research use only. Not for human consumption.